Gentoo Study Meeting talking (English Summary):
homepage: http://gentoo.connpass.com/event/40906/
Live broadcast: https://www.youtube.com/watch?v=j0SzulXKFwI
Introduction:
First Gentoo Study Meeting Tokyo with https://www.youtube.com/watch?v=j0SzulXKFwI
How to become Gentoo Developer introduction talk.
Developer:
Contributing Ebuild:
- sending Git pull request
- Searching for a Mentor on proxy-maint
- Asking in #gentoo-proxy-maint
- Using https://bugs.gentoo.org/
Non committer developer:
- Contributing in Gentoo projects, with work that
not need gentoo git repository access.
- Contributing in the wiki (Not with translation also if
translator need the wiki translator permisson)
How to get help in Japanese:
- #gentoo-ja Freenode
- http://gentoo.slack.comhttp://slackin.aliceinwire.net
- https://github.com/gentoojp/issues
- ?forum
- http://www.gentoo.jp
- Gentoo勉強会 (Gentoo Study Meeting)
- https://wiki.gentoo.org/wiki/Handbook:Main_Page/ja
Gentoo News update:
Talk about Future EAPI 7 ulm slide
Question: When new EAPI are released?
I think there is not a setted release date for EAPI
New feature
- Runtime-switchable useflag
- eqwarn
Banned
- dohtml
- package.provided in profiles
- DESTTREE and INSDESTTREE
Talk about presence of Gentoo booth at Open Source Conference
2016 Tokyo http://www.ospn.jp/osc2016-fall/ :
- Stickers http://www.unixstickers.com/stickers/linux_os_distribution_stickers/gentoo-linux-os-badge-sticker
ask to fondation:
- Banner
size and format
- Table cover
size and format
Presentation:
Presenter: Matsuu san
Slide: Isucon 6 http://isucon.net/
- Team tuning speed contest
- This time was tuning speed contest on azure.microsoft.com
Only distribution with company can give sapport on azure.
Debian have a third party company that is supporting azure.
Gentoo also need something similar.
- Is good to do past problem for have more score on isucon.
vagrant is nice to use for the doing previous problem
- Go language, varnish+ESI, mysql
- https://github.com/matsuu/kataribe access log
analyzer for isucon/tuning
- sshrchttps://github.com/Russell91/sshrc
bring your .bashrc, .vimrc, etc. with you when you ssh.
- Matsu san as been choosen for become staff at the
isucon presentation in the future.
Presenter: @tkshnt
Slide: Report on last update
- let's make Gentoo goods shop for Gentoo-JP
previous OSC item:
- t-shirt (@matsuu, @naota)
- stickers (@matsuu)
next item:
- Gentoo Tenugui (手拭い) https://goo.gl/SVeDHQ
OSC booth:
- presentation
- flyer
Design repository:
- Github
- project management
- simple file upload
Presenter: @d_aki
Slide: my chaotic /etc/portage
- package.use can become chaotic
- /var/lib/portage/world difficult to
remeber when you added something and why
- let's use package.use directory and put file
name about what you are installing
- not what but why you installed the package
Presenter: alicef
Slide: How to contribute on Gentoo Github
- recently Gentoo CVS repository as been converted to Git
- Using the Github mirror is possible to send pull request.
- Good point of pull request:
- Code comment and review from more than one developer
- fast way to send ebuild patch upstream
- QA automatic check
- Bad point of pull request:
- the review are open to see to everyone
- basic git knowledge is needed
When we clone Gentoo repository:
Use git clone --depth=50
for fast pull request with less log information
git clone and git clone --depth=50 time difference:
http://paste.ubuntu.com/23259104/
Presenter: @usaturn
Slide: systemd-nspawn & btrfs
- On Gentoo using systemd-nspawn
btrfs:
- copy on write
- using subvolume we can make snapshot
- compress is possible
- cannot make swapfile
Systemd:
- unit is the process file manager
- using systemd stage 3 is simple to install
- not using syslog but journald
- network setting by networkd
- instead of cron there is timer
- instead of ntp there is systemd-timesyncd
- grub is not needed, instead systemd-boot
(ex gummi boot) work as bootloader
- docker is not needed, instead systemd-nspawn
using machinectl command (good for testing gentoo package)
Presenter: @naota344
Slide: automatically resolving conflict
Gentoo developer, btrfs, linux kernel, emacs, T-code
portage:
resolving conflict
- when USE flag is needed it will ask to
add a USE flag.
- when circulation dependency is detected it will
ask to remove a USE flag, for example
Why there is a conflict:
- Before installing a new package, we
have a package (for example perl-5.20) with all
the the dependency package setted
- when we are goin to update world and we get a
new package update (for example perl-5.22),
also some dependency of perl-5.22 get new update
- in this situation can happen that some dependency
linked
to perl-5.20 get in conflict with perl-5.22
How can we fix such situation:
- we have a option to add --reinstall-atoms="Y"
to emerge command (Y= name of the dependency
package that is causing problem)
- this command will instead of just update the
package it will reinstall the package as if
they are not installed, solving such dependency
problem.
Why package is anyway deciding to automatically
not fixing dependency
maybe because trying to fix all the dependecy will not
work correctly
When portage have conflict for many package
it became more complicated and we will have a command
similar to this:
--reinstall-atoms="A B C D E F G H I L M N ..."
For solving such problem there is emerge --reinstall-atoms
wrapper
https://github.com/naota/emerge-wrapper
- automatically fixing circle dependecy
- showing dependency graph
- there is also a function for make try the
dependency graph in a container
- emerge analyzer tool